depth finder problems

[kwelch]

My depth finder runs fine while my 75 hp. motor is turned off, but as soon as I start the boat motor the depth finder goes crazy. When I turn the boat motor off the depth finder starts working correctly again. HELP! HELP!

 

[mellowyellow]

Re: depth finder problems

interference from ignition?<br />run power wire directly to battery and try it<br />with the motor on. was this on the muffs or<br />underway? prop wash can interfere with transducer<br />reception too. where's it mounted?<br />good luck,<br />M.Y.

 

[kwelch]

Re: depth finder problems

the depth finder worked fine for the first 3 years when I would run the boat but it recently started acting up whenever I started the motor?

 

[roscoe]

Re: depth finder problems

My guess is fluctuating voltage while engine is running. rectifier/regulator problem?

 

[remmer38]

Re: depth finder problems

You need to remove the accesories from your main battery or rebus it. Your motor is hcarging your battery. Putting electronics in a charging circuit is dangerous ( no more elctronics ) and will cause premature failure. Its safe to have several batterys on any size boat where a battery is required. Redundancy. I use a trolling motor battery for my electrics and have a small trickle charger inline. Blah Blah I know but if you have starting problems, another battery is piece of mind. <br />Capt E